We design and manufacture wide range of advanced fully hot runner injection moulds for PET Industry including preforms Moulds, 4 station Single Stage moulds, Cap & closure moulds for all varieties.
In plastic manufacturing, selecting the right moulding process is critical to product quality, production efficiency, and cost optimisation. Two of the most commonly used processes are Injection Moulding and Blow Moulding. While both are fundamental to the plastics industry, they serve very different purposes.
This article breaks down the key differences between injection moulds and blow moulds, helping manufacturers choose the right solution for their application.
Injection moulding is a manufacturing process where molten plastic is injected into a closed mould cavity, cooled, and ejected as a solid part.
Blow moulding is a process used to create hollow plastic products by inflating heated plastic inside a mould cavity.
| Parameter | Injection Mould | Blow Mould |
|---|---|---|
| Product Type | Solid or semi-solid parts | Hollow containers |
| Material Flow | Plastic injected under high pressure | Plastic expanded using air |
| Tooling Complexity | High | Medium |
| Dimensional Accuracy | Very high | Moderate |
| Typical Products | Preforms, caps, medical parts | Bottles, containers |
| Surface Finish | Excellent | Good |
| Cycle Time | Moderate | Faster for large volumes |
Many industries use both processes together—for example, PET bottles use injection-moulded preforms followed by blow moulding.
Understanding the distinction between injection moulds and blow moulds enables manufacturers to make informed production decisions. Precision, application, and output requirements should guide the choice not just cost.
We design and manufacture wide range of advanced fully hot runner injection moulds for PET Industry including preforms Moulds, 4 station Single Stage moulds, Cap & closure moulds for all varieties.
Factory: Leo Precision Pvt. Ltd,.
A-Building Survey No. 127/1, Preeti Indl. Estate, 66 KVA Road, Amli, Silvassa 396230.
U.T. of D & NH, India.